21706291046 has 8 divisors (see below), whose sum is σ = 35519385384. Its totient is φ = 9866495920.

The previous prime is 21706291037. The next prime is 21706291099. The reversal of 21706291046 is 64019260712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493324775 + ... + 493324818.

It is an arithmetic number, because the mean of its divisors is an integer number (4439923173).

Almost surely, 2^21706291046 is an apocalyptic number.

21706291046 is a deficient number, since it is larger than the sum of its proper divisors (13813094338).

21706291046 is a wasteful number, since it uses less digits than its factorization.

21706291046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986649606.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 21706291046 in words is "twenty-one billion, seven hundred six million, two hundred ninety-one thousand, forty-six".